1. Department of Veterinary Population Medicine; University of Minnesota; Saint Paul Minnesota USA
2. Facultad de Veterinaria; Universidad de la Republica; Montevideo Uruguay
3. Servicio de Sanidad Animal; Junta de Castilla y Leon; Valladolid Castilla y León Spain
4. Independent Expert; Lelystad The Netherlands
5. Sanidad Animal; Junta de Castilla y Leon; Valladolid Castilla y León Spain
6. Veterinary Population Medicine; University of Minnesota; Minneapolis Minnesota USA
7. VISAVET Health Surveillance Centre, Universidad Complutense; Madrid Spain
8. Universidad Complutense de Madrid Facultad de Veterinaria; Madrid Comunidad de Madrid Spain